rt/tst-mqueue.h

   1 /* Common code for message queue passing tests.
   2    Copyright (C) 2004-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <mqueue.h>
  21 #include <search.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <sys/uio.h>
  26 #include <unistd.h>
  27
  28 static int temp_mq_fd;
  29
  30 /* Add temporary files in list.  */
  31 static void
  32 __attribute__ ((unused))
  33 add_temp_mq (const char *name)
  34 {
  35   struct iovec iov[2];
  36   iov[0].iov_base = (char *) name;
  37   iov[0].iov_len = strlen (name);
  38   iov[1].iov_base = (char *) "\n";
  39   iov[1].iov_len = 1;
  40   if (writev (temp_mq_fd, iov, 2) != iov[0].iov_len + 1)
  41     printf ("Could not record temp mq filename %s\n", name);
  42 }
  43
  44 /* Delete all temporary message queues.  */
  45 static void
  46 do_cleanup (void)
  47 {
  48   if (lseek (temp_mq_fd, 0, SEEK_SET) != 0)
  49     return;
  50
  51   FILE *f = fdopen (temp_mq_fd, "r");
  52   if (f == NULL)
  53     return;
  54
  55   char *line = NULL;
  56   size_t n = 0;
  57   ssize_t rets;
  58   while ((rets = getline (&line, &n, f)) > 0)
  59     {
  60       if (line[rets - 1] != '\n')
  61         continue;
  62
  63       line[rets - 1] = '\0';
  64       mq_unlink (line);
  65     }
  66   fclose (f);
  67 }
  68
  69 static void
  70 do_prepare (void)
  71 {
  72   char name [] = "/tmp/tst-mqueueN.XXXXXX";
  73   temp_mq_fd = mkstemp (name);
  74   if (temp_mq_fd == -1)
  75     {
  76       printf ("Could not create temporary file %s: %m\n", name);
  77       exit (1);
  78     }
  79   unlink (name);
  80 }
  81
  82 #define PREPARE(argc, argv) do_prepare ()
  83 #define CLEANUP_HANDLER do_cleanup ()